diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-17 07:22:32 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-10-01 03:44:54 -0400 |
| commit | 4758d47e0d685c5e2ee999c355c52d25210c2fbc (patch) | |
| tree | 366ec7187f89ff6836d63eb36f4d05d8ad727407 /arch/x86/kvm/mmu | |
| parent | d786c7783b01a01346f77e8e785030b5096c191a (diff) | |
KVM: MMU: inline set_spte in FNAME(sync_page)
Since the two callers of set_spte do different things with the results,
inlining it actually makes the code simpler to reason about. For example,
FNAME(sync_page) already has a struct kvm_mmu_page *, but set_spte had to
fish it back out of sptep's private page data.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu')
| -rw-r--r-- | arch/x86/kvm/mmu/mmu.c | 21 | ||||
| -rw-r--r-- | arch/x86/kvm/mmu/paging_tmpl.h | 21 |
2 files changed, 12 insertions, 30 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 6ba7c60bd4f8..19c2fd2189a3 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -2674,27 +2674,6 @@ int mmu_try_to_unsync_pages(struct kvm_vcpu *vcpu, gfn_t gfn, bool can_unsync, return 0; } -static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep, - unsigned int pte_access, int level, - gfn_t gfn, kvm_pfn_t pfn, bool speculative, - bool can_unsync, bool host_writable) -{ - u64 spte; - struct kvm_mmu_page *sp; - int ret; - - sp = sptep_to_sp(sptep); - - ret = make_spte(vcpu, pte_access, level, gfn, pfn, *sptep, speculative, - can_unsync, host_writable, sp_ad_disabled(sp), &spte); - - if (*sptep == spte) - ret |= SET_SPTE_SPURIOUS; - else if (mmu_spte_update(sptep, spte)) - ret |= SET_SPTE_NEED_REMOTE_TLB_FLUSH; - return ret; -} - static int mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep, unsigned int pte_access, bool write_fault, int level, gfn_t gfn, kvm_pfn_t pfn, bool speculative, diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h index e4c7bf3deac8..500962dceda0 100644 --- a/arch/x86/kvm/mmu/paging_tmpl.h +++ b/arch/x86/kvm/mmu/paging_tmpl.h @@ -1061,7 +1061,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) int i; bool host_writable; gpa_t first_pte_gpa; - int set_spte_ret = 0; + bool flush = false; /* * Ignore various flags when verifying that it's safe to sync a shadow @@ -1091,6 +1091,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) first_pte_gpa = FNAME(get_level1_sp_gpa)(sp); for (i = 0; i < PT64_ENT_PER_PAGE; i++) { + u64 *sptep, spte; unsigned pte_access; pt_element_t gpte; gpa_t pte_gpa; @@ -1106,7 +1107,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) return -1; if (FNAME(prefetch_invalid_gpte)(vcpu, sp, &sp->spt[i], gpte)) { - set_spte_ret |= SET_SPTE_NEED_REMOTE_TLB_FLUSH; + flush = true; continue; } @@ -1120,19 +1121,21 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) if (gfn != sp->gfns[i]) { drop_spte(vcpu->kvm, &sp->spt[i]); - set_spte_ret |= SET_SPTE_NEED_REMOTE_TLB_FLUSH; + flush = true; continue; } - host_writable = sp->spt[i] & shadow_host_writable_mask; + sptep = &sp->spt[i]; + spte = *sptep; + host_writable = spte & shadow_host_writable_mask; + make_spte(vcpu, pte_access, PG_LEVEL_4K, gfn, + spte_to_pfn(spte), spte, true, false, + host_writable, sp_ad_disabled(sp), &spte); - set_spte_ret |= set_spte(vcpu, &sp->spt[i], - pte_access, PG_LEVEL_4K, - gfn, spte_to_pfn(sp->spt[i]), - true, false, host_writable); + flush |= mmu_spte_update(sptep, spte); } - return set_spte_ret & SET_SPTE_NEED_REMOTE_TLB_FLUSH; + return flush; } #undef pt_element_t |